| Code Sample |
#!/bin/bash # declobber v0.2.1 by wdef Feb 10 2007 # Removes clobber dirs from .dsl extensions # Changes v0.2.1 # uniq -u -> uniq in pipe feeding dir_filter # Changes v0.2 # 1. If used on livecd legacy boot or equivalent, can differentiate between isolated empty clobber dir # that also occurs on base system and one that is non-base (ie added by user or other extension). # This is noted in the results for information. However, isolated empty dirs are infrequent in # extensions. # 2. Help and message related to (1) added. # 3. Added checks for work dir # 4. Minor changes to output. #==========================// USER SETTING//=============================== # Put DIR on a hard drive linux partition if insufficient room in /ramdisk/home/dsl DIR=/home/dsl #==========================// FNS //======================================== help(){ cat <<"EOF1" declobber v0.2.1 - removes clobber directories from damnsmalllinux extensions by wdef Usage: declobber <ext1.dsl ext2.dsl ..> Run as root to preserve all permissions. Creates a work dir in $DIR Declobbered extension is output in $DIR Default DIR=/home/dsl EOF1 exit } check_work_dir(){ # Check work directory looks ok if [ -z "$DIR" ]; then "${RED}User setting work dir is unset.${NORMAL}"; exit 1; fi case ${DIR} in /mnt/*) D=$(echo ${DIR} | awk -F/ '{print "/" $2 "/" $3 }' ) FS=$(grep ${D} /proc/mounts | awk '{print $3}') if [ -z "$FS" ]; then echo "${RED}$D not mounted.${NORMAL}"; exit 1; fi case $FS in ext*|*eiser*);; *fat*|*dos*) echo "${RED}$DIR on $FS can't preserve perms - use linux filesystem.${NORMAL}"; exit 1;; ntfs) echo "${RED}Writing to ntfs is not a good idea ${NORMAL}"; exit 1;; esac;; /*|/ramdisk/*);; *) echo "${RED}Err .. where exactly _is_ this $DIR anyway?"${NORMAL}; exit 1;; esac if [ ! -d "${DIR}" ] || [ ! -w "${DIR}" ]; then echo "${RED}$DIR not a dir or not writeable.${NORMAL}"; exit 1 fi } not_legacy_live_msg(){ cat <<"EOF2" This is not a legacy livecd boot. If your extension contains isolated empty directories that are also found on the system, declobber cannot be certain if these are clobberring base system directories or directories added by user/other extensions, or both. I will note any such dirs in the results. EOF2 } checkon_system(){ # Remove empty dirs if already on system # Make note in results of empty dirs that appear to clobber non-base dirs (eg added by other extensions) # or if declobber can't tell. if $LEGCD; then if [ -e "/${LM}" ]; then if [ ! -e "/KNOPPIX/${LM}" ]; then echo ${LM} >>${clobber_list} echo "Removing empty dir /${LM} - clobbers non-base added directory" >>${results} else # this *is* a system clobberring dir ! echo ${LM} >>${clobber_list} fi else echo ${LM} # OK fi else if [ -e "/${LM}" ]; then echo "Removing empty dir /${LM} - clobbers either base or added directory" >>${results} echo ${LM} >>${clobber_list} else echo ${LM} # OK fi fi } dir_filter(){ # Filter out non-empty dir lines from stdin while read LM; do if [ -d "${WORK}/${LM}" ]; then if [ $(ls -1A ${WORK}/${LM}| wc -l) -eq 0 ]; then checkon_system else # this *is* a self and/or system clobberring dir ! echo "${LM}" >>${clobber_list} fi else # files, symlinks - ok echo ${LM} fi done } #=========================// MAIN //======================================= . /etc/init.d/dsl-functions # for ANSI colors if [ "${1}" = -h ] || [ "${1}" = --help ] || [ $# -eq 0 ]; then help; fi check_work_dir if [ -e /etc/sysconfig/unionfs -o ! -e /KNOPPIX/bin/ash ]; then LEGCD=false; not_legacy_live_msg else LEGCD=true; fi if [ $EUID -ne 0 ]; then while true; do echo "${WHITE}You need to be root to conserve all permissions." echo -n "Quit? (y/n)${NORMAL} " read case $REPLY in y|y*|Y|Y*) exit 1;; n|n*|N|N*) break;; *) echo "Invalid response";; esac done fi results=/tmp/declobber_results rm -f ${results} # preclean CURRENTD="${PWD}" APP="" for APP in $*; do echo ".........................................................................." echo >>${results} # If no path supplied, assume current working dir if echo ${APP} | grep -q -v '^/'; then APP="${CURRENTD}/${APP}"; fi if [ ! -e "${APP}" ]; then echo "${RED}Can't find ${APP}${NORMAL}" >>${results} continue fi if [ ${APP##*.} != dsl ]; then echo "${RED}${APP} is not a .dsl extension.${NORMAL}" >>${results}; continue; fi NAME=$(basename ${APP} .dsl) WORK=${DIR}/$NAME LIST_IN=${WORK}/list_in LIST_OUT=${WORK}/list_out clobber_list=${WORK}/clobber_list if [ -e "${WORK}" ]; then echo "${RED}${WORK} already exists.${NORMAL}" >>${results}; continue; fi mkdir ${WORK} echo echo "${WHITE}Removing any nasty clobbering dirs from ${YELLOW}$NAME.dsl ..${NORMAL}" echo sleep 1 cd ${WORK} touch "${clobber_list}" # zero count initialised tar -zxpvf ${APP} echo -n "${WHITE}Working ..${NORMAL} " tar -ztf ${APP} | sort | uniq | tee ${LIST_IN} | dir_filter >${LIST_OUT} & rotdash $! NEWNAME=${NAME}_noclobber.dsl tar -T ${LIST_OUT} --no-recursion --numeric-owner -cpf- | gzip -9 >"${NEWNAME}" & rotdash $! if [ ! -s "${NEWNAME}" ]; then echo "${RED}Problem making $NAME_noclobber.dsl" >>${results}; continue; fi # Debug - check that clobbers removed = difference between in and out DIFF=$(cat ${LIST_IN} ${LIST_OUT} | sort | uniq -u | cat - ${clobber_list} 2>/dev/null | sort | uniq -u | wc -l) if [ $DIFF -ne 0 ]; then echo "Error. Removed dirs and difference between in/out unequal, exiting .."; exit 1; fi echo "${GREEN}Now test your new ${YELLOW}${NEWNAME}!${NORMAL}" CDRS="$(cat ${clobber_list} 2>/dev/null |wc -l)" CLOBBERS=${CDRS##*[ ]} echo "Removed ${YELLOW}$CLOBBERS${NORMAL} clobber dir(s) from ${YELLOW}$NAME.dsl${WHITE} --> ${GREEN}${NEWNAME}${NORMAL}" >>${results} echo "See ${clobber_list}" >>${results} cd ${CURRENTD} done echo echo "==========================================================================" echo echo "${WHITE}DECLOBBER ${WHITE}RESULTS:${NORMAL}" echo cat ${results} echo echo "==========================================================================" echo "${GREEN}Finished.${NORMAL}" exit 0 |
| Code Sample |
DIR=/home/dsl |
| Code Sample |
DIR=/home/dsl while getopts ":o:" opt; do case $opt in o) DIR=$OPTARG shift $(($OPTIND - )) ;; \?) echo 'Usage: declobber.sg [ -o directory ] ex1.dsl ext2.dsl ...' exit 1 esac done |